Lifting jack



Nav. 22, 1927.

- M. PIERCE '1650537 LIFTING JACK Fi1eaJan-15 2v 2 e t`1 INVENToR WITNESS! ATTCRNEY Patented Nov. 22, T927.'

MAURICE einem, or Bessere NORWAY.

LIFTING Jeux, t

[Application led January 15,Y 1927. Serial No, 161,449.

The objects of my present invention are briefly as follows:

To provide a support or holder which `will receive the axles of vehicleswhen presented at various elevations without the `necessity of previous adjustment in `preparation for the different. heights. weight to be accomplished without shock or jar especially when the weighty of theve-V hiclc is automatically transferred froni a primary lifting plane f'placed under the wheel. t

Further.y to providethesupport `with n sliding base which` will enable to move over the ground. after 'receiving a weight y.

construction `illustrated in .Figure 6. v y Figure 8 is aperspective view tol illustrate` the! `hinged `connection between the thus avoiding a strain on `the Vdeviceorto the vehicle until such time as the momentum is exhausted.

To construct the. device in such manner that the weight may befretransferred tothe ground through the reemployment of atilting inclined plane7 inserted under the wheel and inclining in the opposite direct-ion from that in which it was first placed for elevatinfr.

l? o enable the device to collapse at will when aI weight is being support-ed as well yas when the device isinotin use.

To enable the device when collapsed fto be folded compact-ly together for-storing in a` small space.

To be ,quickly made readyv for useand likewise quickly collapsed and foldechy To'have bases wide enoughto prevent the device from falling over sidewise.

To provide the bases with runnersy `or guides on their under surfaces which will cause thedevice. when sliding to. move in a straight longitudinal path. l y

To provide the uppei'beaiing surface of the device with a. combined shockl absorbing and non-shielding material which may easily be removed when worn and a new surface attached. thus offering protectionfto the axle of the vehicle and to the device as well as preventing the former from slippingbaclrward on the latter. I

The device to be light in weight,` strong, durable, easy to operate, but-which will not get out of order and which will remain clean.

These objects. and others I accomplish in The 'receipt of the the` following manner described and claimed and by use of ythe parts fully illustrated by the accompanying drawings.`

Inthe drawings.:

Figure l is a side elevation of theim- Figure 5` is a side elevation of the improv-ement in folded or collapsed position,

s Figure 6 is a detail' sectional View ap# proximately on the line (S+-6 of `Figure 7.

Figure 7 a. vplan-view of 'a' part` ofthe plene sections. t

' An inclined: plane vof slightly lessV than two feet in :maximum height and approximately` three feet inlength is formedof two sectionsI of U steel 1` and. 2 with their concave surfaces facing upward and rigid back surface downward. These two plane sections are attached together by ineens of two plate hinges. 3. which are fastened with pivots 4; and 5. Strips of wood or other filling material 6. arepaclred in the Ufshaped sections on their inside bottoms and may be secured by rivets 7;

A shock absorbing and non-skiddingupper surface 8, illustrated. in form of a piece of ordinary` hemp rope7 is inserted.intoV the Ll-shaped steel plane; andlis held fast VKat either end1 by screw fasteners 9,..and near its middlebythe `hinge pivotboltsli and 5, which pierce the rope as they pass through from` one Vside ofthe plane to the other.

Where the two sections of the plane come together near the middle, their endsA `are notch-ed, as 4at lO. At thelower extremity of fsectionl, the plane rests Vupon a broad upturned sliding base 11, which hasy runners onguides 12 on its under surface. This base is "attached Lto the plane by means of a pivot bolt 13, which permits. the basezto swing into line with the plane asillustrated in? Figurel 2, but which when ready for 4.use permits the wide base to be held at a degt/Q91 angle'tothel plane `with the assistance l erably of light, strong metal, illustrated as a l section of U-shaped steel- The upright support section 17, is provided with apertures 18, at its upper extremity into which a pivot Y bolt 19 is inserted and passes through the upper end of the inclined plane.

The upright support 17 is mounted on a Sledge like base Y20, to which it is firmly attached by means of rivets 21.

The base 20 is constructed of asection ol light, strong channeled metal which is up- "turned in ski-like fashion at its two/ends,

22, and its under Hanges ,23' form runners or guides for straight sliding purposes.

A middle support 24 is swingably attached to the base 20, by4 means of a pivot boltv 25, inserted in apertures 26, in the upper flanges or extensions thereon of the base 20, the said bolt also passiii'gthi'ough the lower eXtrem ityof the middlefsupport 24.1"

*i The middlesupportis 'shown' constructed of a section of light, strong U-shapedmetal similar in materialanddimensions'to that fused for the uprightsupport-l''.' The concave sides of the supports 24 and 17 face each other and when the middle support 24. is swung'in the direction of section 17, a box or hollow case fis formedwithin which the plane sections l 'and 2, may have been previously collapsed, as will hereinafter be fully set forth.

' The middle diagonallyupright support or lbrace section 24isdesigned to give support to the hinged and notched joint, 10, formed at the middle where lthe two plane sections 1 and 2, comeV together.- j

This support' isA formed :as shown in the drawing byQsli'ttiug the upper back face 0f supportt24, as atf27, and a small, section of this back face: bounded by the slits is bent 'out to form fa- 'resting flange or. ledge 28, while the sides ofthe middle support 24 extend upward on each side of the plane section 2.

An aperture 29 is drilledthrough the upper extremity of the middle support and 'passes horizontally through both sides ofthe plane section 2, just between the bottom face of plane section 2 and its upper nonskidding surface attachment. This space has beenshown as filled with wood or other packing and the holeV will consequently pass `through this substance as well.

A pin' bolt 30is provided foi-'insertion 'into the aperture 29, to prevent the middle support 24, from falling or sliding away from its position of support. Immediately under the notched joint the pin bolt is attached to the middle support by means of a hole or eye rivet 31, and a cord or small chain 32.

The pin bolt 30, will be inserted when the device is being made ready for use and extracted when ready to be folded. A light strong chain or piece of cable 33, is attached to the base upon which the supports 17 and 24 are mounted by means of a small rivet or screw eye 34, inserted through an aperture 35, in the rear upturned end of the base and the opposite end of this chain or cable is attached to the lower extremity of the plane by means of an eye screw or rivet 36.

This chain or cable is obviously for the purpose of preventing the two bases from spreading away from one another when the device is supporting a heavy weight. A swinging hook 37, is riveted or screwed to the support 17, and an eye loop 38 similarly attached to-the support 24.

The collapsing ofjmy device is accomplished almost instantly by removing the pin bolt 30, whereupon the middle support 24 falls or is thrust downward. The notched joiningV ends of the planes 1 and 2, collapse downward until the notched end of section 2 of the.4 plane is folded within the hollow support 17, at the lower exi remity of the latter. l,

The notched end ofthe plane section ,l follows'suitand finds itself folded down` ward-on the top of the base 20.

Now the wide base 11 is swung on its pivot 13, into line with plane section 1 and the base end of plane sect-ion 1 is found already swung upward to a position close to the top of support 17; The hollow support 24, as previously mentioned isy now swung back in the direction of support 17, and Vthe 'swinging hook 37 is hooked 'into the eye loop 38. XVe thusfhavefplane sections'l and 2, rst collapsed, second folded, andf third. encased within they hollow supports 17 and 24. f Y

My improvement isvespccially designed to operate in conjunction witha primary elcvating plane which is' placed in the path,

of one wheel at a time, of advancingvchicles.

The receiving and supporting plane above descrilied has demonstrated for the inventor its ability to automatically receive, advance, support, transfer, and lower heavy weights withoutshock, strain or injury to the vehicle. or the device. Its sliding base feature is considered novel-in a device of this kind. All other devices of this kind, within my knowledge have depended, in one or another manner, upon their ability to hold fast to the ground before or after they are to, or have relill ceived;v weights. Such: devices have not proven successful since they firstly .will not remain in proper position, secondly, will not automatically receive, and thirdly if able to suddenly check the advancing weight, the shock will prove injurious to both thevehicle and thedevice. n i i By experimenting I` have discovered that a remarkably steep angle can be used for the supporting plane before any` back sliding will take place on theV part `of the elevated axle. This is true without the application of en'iergency or other brakes, andfwhen the latter is employed as a precaution, the possibility of back slide is entirely eliminator. The fact must notbe overlooked `that the heavy weight of the car, resting: on three other points, namely, thefthree other wheels, must be thrust backward before the aXle can slide backward` on the plane and it must also be borne in mind that the initialmomentum was only horizontally forward and downward. When at rest the emergency of gravity is exerting itself in a' direct downward di,i rection. v i

Having described the inventioml claim l. In. a device for the purpose set forth,`

an inclined plane having a friction surface, and comprisingtwo hingedly connectedsections, a vertical brace pivotally secured to the elevated endl of the plane, a support removably secured to and supporting the joint between the plane sections and said supports providing a housing for the plane whenthe sections thereof are folded. j

2. In a device for the purpose set forth, an inclined plane having a friction surface and comprising two hinged sections, a hollow vertical support to which the elevated end of the plane is pivoted, a hollow pivotally supported brace swingable to Contact with the plane designed to be removably secured thereto and to support the joint between the plane sections, and said plane when folded designed to be housed between the brace and support.

3. In a. device for the purpose set` forth, an inclined plane having a friction surface and comprising two hinged sections, a hollow vertical support to which the elevated end of the plane is pivoted, a hollow pivotally supported brace swingable to con tact with the plane designed to be removably secured thereto and to support the joint between the plane sections, and said plane when folded designed to be housed between the brace and support, and means for latching the support and brace when the plane sections are folded therebetween.

4. In a device for the purpose set forth, an inclined plane having a friction surface and comprising to hingedly connected sections, a channeled vertical support in which the elevated end of the plane is pivoted, a channeled pivotally supported brace having an outstanding flange, and its sides extending' beyond said flange tov Contact with the sides ofthe plane and` tol permit of the.

flange underlyingthe joint between the vrplane sections, removable means for securing the port when the plane vis, folded therebetween. Y

' 5. Ina deviceifor the purpose set forth,

an inclined plane having a friction surface` and comprising two sections, straps having their ends pivotally secured to the confront ing ends of the said sections, a vertically disposed channeled support in which the elevated end of the plane is pivoted, a pivotally supported channeled brace having an outstanding iiange and its sides extended beyond the saidfiange, to embrace the sides ofthe plane and to permit of the said flange underlying the joint of the plane sections, a flexibly supported pin on the brace designed to be passed through the projecting sides thereof and thro-ugh Vone of the. planesections, said plane, when folded, ydesigned te be housed between the supportand the brace, and latch means carried by the support for engaging. the brace when the plaine is folded therebetween. f

6.1In` a device for the purpose set forth, an inclined plane comprising a channel member having a friction surface therein whose ends are removably secured thereto and whose outer surface projects therefrom, said plane comprising two hingedly connected sections, a channeled support in which the elevated end of the plane is pivoted, a pivot-ally supported channeled brace swingable to engage with the plane and to support the jointbetween the sections thereof, removable means holding` ,the

' brace in such position, and said support and brace providing a housing for the plane when the'sections thereof are folded,

7. In a device for the purpose set fort-h, an inclined plane comprising1 a channeled member, made up of two hinge-elly connected sections, a friction element comprising a rope received in the channel of the plane, having its ends removably secured thereto and its outer surface projecting therebeyond, a pivotally supported laterally extending base for the lower'end of the plane, a swingable latch on the plane engageable with the base for holding the same laterally with respect to said plane, a skid, a channeled support having one end fixedly secured on the skid, and its upper portion receiving therein the elevated end of the plane, a pivot connecting the support to the plane, a channeled brace pivotally supported on the skid, and swingable for cont-act with the sides and with the base of the plane to support the joint between the plane sections, means irrt for removably securing the brace to the plane, and said support and brace providing a housing for the plane when the sections of said plane are folded together.

Y 8. In a device for the purpose set forth, an inclined plane comprising a channeled member, made up of two hingedly connected sections, a friction element comprising a rope received in the channel of the plane, having its ends removably secured thereto and its outer surface projecting therebeyond,

a pivotally supported laterallyextending base fory the lower' end of the plane, a swingable latch on the plane engageable with the base for holding the saine laterally with respect to said plane, a skid, a channeled supporti having one end iixedly secured on the skid, and its upper portion receiving therein 'the elevated end of the plane, a pivot connecting the skid to the plane, a channeled brace pivotally supported on the skid, and swingable for Contact with the sides and with the base of the plane to support the joint betweenthe plane sections, means removably securinc the brace to the plane, said support and l brace providing a housing for the plane when the sections of said-plane are folded together, and a flexible connection between the skid and the lower end of the plane.

9. In a device for the purpose set forth, an

inclined plane having a friction surface and comprising hinged sections, supporting and bracing means for the plane, and said means providing a housing for the plane when the sections thereof are folded.

l0. In a device for the purpose set forth, an inclined plane comprising two hingedly connected sections, a comparatively wide base to which the lower end of the plane is pivotally secured, said base having its edges beveled upwardly and its outer face provided with spaced transversely extending ribs, and one of said edges having a central notch, a pivotally supported gravity vin'- uenced dog carried'by the plane andengageable within the notch, a skid comprising an eye beam having its ends rounded up wardly, a fixed support in the skid to which the elevated end o1". the plane is pivoted, a pivoted brace on the skid engageable with the plane at the joint between the sections, removable means for latching the brace to the plane, a removable and adjustable fleX` ible connection between the lower end of the frame and the skid, and said brace and support providing a housing for the plane when the sections of the latter are folded therebetween.

In testimony whereof Iv allix my ture.

MAURICE PIERCE.

signa- 

